Question

What is considered as zero point on the Kelvin scale?

(a) -273.15K

(b) -273.15°C

(c) 0°C

(d) -273.15°C

I have been asked this question during an online exam.

The above asked question is from Thermal Properties of Matter in section Thermal Properties of Matter of Physics – Class 11

Answer 1

The correct choice is (b) -273.15°C

Best explanation: Zero point on the kelvin scale is absolute zero point.                                                                                     This corresponds to the temperature of -273.15°C.                                                                                                          Also note that the kelvin scale and celsius scale have the same size of unit,                                                        so K = 273.15 + °C.